I would like to create shapes in OmniGraffle for iOS with negative space. The letter ‘O’ or the number ‘8’ for example. I have been breaking such shapes into smaller pieces and then grouping them for now, but I noticed the “circle with a strike through” or “forbidden symbol” in the shapes bin. (Last shape in the list). It has negative space. I have attempted to deconstruct or recreate this shape but to no avail.